在Magento观察员中设置产品税

Question

I'm using sales_quote_add_item and I'd like to change the tax class of a product. In observer, I retrieve product:

$event = $observer->getEvent();
$item = $event->getQuoteItem();
$product = $item->getProduct();

I tried $item->setTaxClassId() and $product->setTaxClassId() methods but this didn't work.

Any other approaches available?

Answer 1

If you want to change product_tax_class using observer then you have to use sales_quote_item_set_product.

The function Mage_Sales_Model_Quote_Item::setProduct resets some of the basic information each time a product is saved

config.xml

<config>
...
    <global>
        <events>
            <sales_quote_item_set_product>
                <observers>
                    <samples>
                        <type>singleton</type>
                        <class>samples/observer</class>
                        <method>salesQuoteItemSetProduct</method>
                    </samples>
                </observers>
            </sales_quote_item_set_product>
        </events>
    <global>
...
</config>

Observer.php

class Mynamespace_Samples_Model_Observer
{
    public function salesQuoteItemSetProduct(Varien_Event_Observer $observer)
    {
        /* @var $item Mage_Sales_Model_Quote_Item */
        $item = $observer->getQuoteItem();

        $item->setTaxClassId('2');

        return $this;
    }
}

Let me know if you have any query